Chromium-2 Phosphide Charge Balancing

The video tutorial explains how to write the formula for chromium-2 phosphide. It begins by identifying the element symbols for chromium and phosphide, noting that phosphide is a single element. The tutorial then discusses the charges of chromium and phosphorus, emphasizing the need to balance these charges to achieve a neutral compound. The crisscross method is introduced as a tool to simplify the balancing process. Finally, the tutorial verifies the formula by ensuring the net charge is zero, confirming the correctness of the formula.

What is the symbol for chromium when writing the formula for chromium-2 phosphide?

• Cm

• Ch

• Cr

• C

What does the suffix 'ide' indicate in the name phosphide?

• A polyatomic ion

• A single element

• A transition metal

• A compound

What is the charge on chromium in chromium-2 phosphide?

• 1+

• 2+

• 0

• 3+

What is the charge on phosphorus in chromium-2 phosphide?

• 2-

• 0

• 1-

• 3-

Why is it important to balance the charges when writing the formula for chromium-2 phosphide?

• To decrease the compound's weight

• To increase the compound's reactivity

• To make the compound neutral

• To ensure the compound is stable

What method is used to balance the charges in chromium-2 phosphide?

• Cross-multiplication method

• Crisscross method

• Substitution method

• Addition method

What is the result of applying the crisscross method to the charges of chromium and phosphorus?

• Cr3P2

• Cr2P3

• CrP2

• CrP

How do you verify the correctness of the formula for chromium-2 phosphide?

• By ensuring the net charge is zero

• By testing the compound's solubility

• By checking the color of the compound

• By measuring the compound's mass

What is the net charge of the correctly balanced formula for chromium-2 phosphide?

• +1

• -1

• 0

• +2

Who is the presenter of the video tutorial?

• Dr. C

• Dr. B

• Dr. D

• Dr. A